138775545 has 32 divisors (see below), whose sum is σ = 247472640. Its totient is φ = 73785600.

The previous prime is 138775523. The next prime is 138775579. The reversal of 138775545 is 545577831.

It is a happy number.

138775545 is a `hidden beast` number, since 1 + 38 + 7 + 75 + 545 = 666.

138775545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138775545 - 2⁸ = 138775289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 138775545.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48145 + ... + 50945.

It is an arithmetic number, because the mean of its divisors is an integer number (7733520).

Almost surely, 2^138775545 is an apocalyptic number.

138775545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138775545 is a deficient number, since it is larger than the sum of its proper divisors (108697095).

138775545 is a wasteful number, since it uses less digits than its factorization.

138775545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182 (or 3176 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The square root of 138775545 is about 11780.3032643477. The cubic root of 138775545 is about 517.7311716605.

The spelling of 138775545 in words is "one hundred thirty-eight million, seven hundred seventy-five thousand, five hundred forty-five".